Concept explainers
To identify the experimental units and the treatments.

Answer to Problem 49E
The pine seedling are then the experimental units and the treatments are the different levels of the amount of light used to experiment.
Explanation of Solution
The experiment is assigning treatments to pine seedlings in a greenhouse and thus these pine seedling are then the experimental units.
As the experimental units are the individuals on whom an experiment is performed.
And the treatments are what the experimental units are subjected to.
Therefore, we are interested in the influence of the amount of lights on the weight of the tree. Thus, the treatments are the different levels of the amount of light used to experiment the pine seedlings. That is full light/light reduced to
Chapter 4 Solutions
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